A square culvert jacking posture correction guide mechanism based on multi-point stress balance

Abstract

The application discloses a square culvert jacking attitude deviation rectification guide mechanism based on multi-point stress balance, relates to the field of geotechnical engineering, and comprises a jacking base and guide plates symmetrically movably inserted on one side of the upper end of the jacking base, one end of the guide plate away from the jacking base is fixedly provided with a square culvert body, a plurality of hydraulic jacks are movably arranged on the side of the jacking base facing the square culvert body, a plurality of extrusion plates abutting against the side walls of the guide plates are symmetrically and slidably arranged on one side of the upper end of the jacking base, a plurality of hydraulic cavities are formed on both sides of the upper end of the jacking base, and a piston movably penetrating the middle of each extrusion plate is slidably arranged in each hydraulic cavity. The transverse displacement of the guide plate triggers the displacement of the piston, the hydraulic oil flows into the conveying cavity and enters the outermost hydraulic jack through the conveying pipe, the jacking force of the outermost hydraulic jack is changed, the deviation rectification torque is applied to the square culvert body through the spherical hinge, and the automatic sensing and deviation rectification of the square culvert jacking attitude are realized.

Description

Technical Field

[0001] This application pertains to the field of tunnels, and more specifically to the field of geotechnical engineering, particularly to a culvert jacking attitude correction and guidance mechanism based on multi-point stress balance. Background Technology

[0002] A culvert is a rectangular box-shaped underground passage structure assembled from reinforced concrete or precast components. It is commonly used in urban drainage, power and communication pipelines crossing roads or railways, pedestrian and vehicular tunnels, and other projects. It is constructed by jacking or open-cut methods and has advantages such as high structural strength, regular internal space, and adaptability to complex geological conditions. It is convenient for protecting pipelines and meets the comprehensive functional requirements of traffic, flood control, etc.

[0003] Traditional culvert jacking construction typically involves prefabricating reinforced concrete box culverts in a working pit and then gradually jacking them into place on the roadbed using hydraulic jacks and other equipment. During construction, the culverts are prone to shifting to the left or right due to factors such as uneven geology and inconsistent excavation volumes. Summary of the Invention

[0004] To address the issue of lateral deviation during the jacking process of culverts, this application provides a culvert jacking attitude correction and guidance mechanism based on multi-point stress balance.

[0005] The culvert jacking attitude correction and guidance mechanism based on multi-point stress balance provided in this application adopts the following technical solution: A culvert jacking attitude correction and guiding mechanism based on multi-point stress balance includes a jacking base and guide plates symmetrically and movably inserted on one side of the upper end of the jacking base. A culvert body is fixedly mounted on the end of the guide plate away from the jacking base. Multiple hydraulic jacks are movably mounted on the side of the jacking base facing the culvert body, and ball joints fixed to the culvert body are fixedly mounted on the ends of the hydraulic jacks away from the jacking base. Multiple pressing plates are symmetrically and slidably mounted on one side of the upper end of the jacking base, abutting against the sidewalls of the guide plates. A ball joint is fixed on the side of the pressing plates away from the guide plate. The jacking base has multiple hydraulic chambers on both sides of its upper end. A piston that slides through the middle of the corresponding extrusion plate is slidably installed inside the hydraulic chamber. A conveying chamber that communicates with the hydraulic chamber is symmetrically opened at the upper end of the jacking base near the hydraulic chamber. A conveying pipe is fixedly installed through the conveying chamber on the jacking base. The ends of the two conveying pipes away from the conveying port are fixedly connected to the two outermost hydraulic jacks. Multiple hydraulic cylinders are fixedly installed in the middle of the bottom end of the jacking base. A gripping plate is fixedly installed at the bottom end of the multiple hydraulic cylinders.

[0006] By adopting the above technical solution, the lateral displacement caused by the guide plate deflecting with the culvert body drives the compression plate to move together with the spring in the movable groove. This causes the circular hole in the middle of the compression plate to misalign with the end of the piston rod, allowing the hydraulic oil in the hydraulic chamber to flow into the conveying chamber through the guide hole, and then into the corresponding outermost hydraulic jack through the conveying pipe. This changes the jacking force of the hydraulic jack, and applies a correction torque to the culvert body through the ball joint, thereby realizing automatic sensing and real-time correction of the culvert jacking posture. This improves the jacking accuracy and construction efficiency, and avoids the culvert offset problem caused by uneven geology or inconsistent excavation volume. The hydraulic cylinder drives the gripping plate to press the ground, enhancing the stability during the jacking process.

[0007] Preferably, the lower end of the jacking base is provided with a pressurizing mechanism connected to the hydraulic jack at a location in the slide groove. The pressurizing mechanism cooperates with the gripping floor to assist the gripping floor in locking the jacking base when the hydraulic jack is jacking.

[0008] By adopting the above technical solution, the pressurizing mechanism is linked with the hydraulic jack's jacking action, and during jacking, the gripping floor is further locked to prevent the gripping floor from lifting or shifting.

[0009] Preferably, a rectangular groove is provided on the upper end of the side of the jacking base facing the culvert body, and movable grooves are symmetrically provided on the side wall of the rectangular groove. Multiple extrusion plates slide in the movable grooves, and one end of the guide plate extends into the movable groove.

[0010] By adopting the above technical solution, the rectangular groove provides sliding guidance and limiting space for the extrusion plate, ensuring that the extrusion plate moves in a predetermined direction and accurately transmits the lateral displacement of the guide plate to the hydraulic sensing system.

[0011] Preferably, the two ends of the spring are fixed to the extrusion plate and the side wall of the movable groove, respectively.

[0012] By adopting the above technical solution, spring one is used to provide elastic restoring force to the extrusion plate, and to perform adaptive buffering and fine adjustment when the culvert body undergoes slight deflection.

[0013] Preferably, a plurality of circular grooves are provided on the lower end of one side of the jacking base, and a connecting block is slidably arranged inside the circular groove. One end of the connecting block is fixed to the fixed end of the hydraulic jack, and a spring is fixed to the end of the connecting block away from the hydraulic jack. The two ends of the spring are respectively fixed to the end of the connecting block away from the hydraulic jack and the inner wall of the circular groove.

[0014] By adopting the above technical solution, the connecting block and spring three are used to realize the elastic movable connection between the hydraulic jack and the jacking base, and provide buffering and automatic reset functions when the hydraulic jack is jacking or retracting.

[0015] Preferably, a plurality of sliding grooves I are provided on one lower end of the jacking base, a fixed shell is fixedly provided on the lower end of the side of the jacking base away from the culvert body, a plurality of sliding grooves II are provided on the side of the fixed shell near the jacking base and communicating with the corresponding sliding grooves I, and a plurality of connecting shells are fixedly provided on the bottom end of one side of the fixed shell.

[0016] By adopting the above technical solution, slide 1, slide 2 and connecting shell provide installation space and sliding guide rail for the pressurizing mechanism, ensuring that each component of the pressurizing mechanism moves smoothly along the predetermined trajectory.

[0017] Preferably, the pressurizing mechanism includes a symmetrically arranged transmission block 1 and a transmission block 2 that abuts against the transmission block 1. One end of the transmission block 1 is fixed to the fixed end of a plurality of hydraulic jacks. The end of the transmission block 1 away from the hydraulic jacks slides in a plurality of slide grooves 1. The transmission block 2 slides in a slide groove 2. A rotating block 1 is rotatably arranged at the lower end of the transmission block 2. A rotating block 2 is rotatably arranged in the middle of the rotating block 1. The rotating block 2 is rotatably connected to the inner wall of the slide groove 2. A slider is rotatably connected at the end of the rotating block 1 away from the transmission block 2. The slider slides on the upper concave surface of the connecting shell. A T-shaped plate is slidably arranged inside the connecting shell. The slider is connected to the T-shaped plate by a spring 2. A spring 2 is arranged on the side of the T-shaped plate near the slider. The two ends of the spring 2 are respectively fixed to the sides of the slider and the T-shaped plate that are close to each other.

[0018] By adopting the above technical solution, the pressurizing mechanism, through the linkage of transmission block one, transmission block two and rotating components, converts the horizontal movement of the hydraulic jack into the horizontal extension movement of the T-shaped plate, and applies lateral pressure to the gripping floor to assist in locking.

[0019] Preferably, a sliding plate is provided below the jacking base and the culvert body, and adjustable and retractable rollers are provided at the lower ends of both sides of the jacking base, with the wheel surface of the rollers making rolling contact with the side wall of the sliding plate.

[0020] By adopting the above technical solution, the slide plate provides a sliding platform for the jacking base and the culvert body, and the rollers roll in contact with the side wall of the slide plate to limit and guide the jacking base laterally.

[0021] Preferably, a limiting groove is provided in the middle of one side of the jacking base, and a limiting plate is fixedly provided at the lower end of one side of the culvert body, which is movably inserted into the limiting groove. The size of the limiting groove is larger than the cross-sectional size of the limiting plate, and is used to limit the maximum deflection angle of the culvert body.

[0022] By adopting the above technical solution, the limiting groove and the limiting plate cooperate to reserve the normal jacking space of the culvert body, and limit its maximum deflection angle by the side wall when an unexpected large deflection occurs.

[0023] Preferably, the bottom end of the jacking base is provided with multiple wheels on both sides.

[0024] By adopting the above technical solution, the wheels are used to provide rolling support when the jacking base moves.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By the lateral displacement of the guide plate, the compression plate moves together with the spring in the movable groove, causing the circular hole two and the piston rod end to be misaligned. This allows the hydraulic oil in the hydraulic chamber to flow into the conveying chamber through the guide hole, and then into the corresponding outermost hydraulic jack through the conveying pipe and three-way valve. This causes the jacking force of the hydraulic jack to change. By applying a correction torque to the culvert body through the ball joint, the automatic sensing and correction of the culvert jacking posture is realized, which improves the jacking accuracy and construction efficiency and avoids the culvert deviation caused by uneven geology or inconsistent excavation volume. 2. The hydraulic cylinder is controlled by the oil pump control console to press the gripping plate against the sliding plate to fix the jacking base. During the jacking process, the hydraulic jack drives the transmission block one to move horizontally with the hydraulic jack, so that the wedge-shaped inclined surface of the transmission block one abuts against the top inclined surface of the transmission block two, converting the horizontal motion into the vertical downward motion of the transmission block two. This causes the rotating block one to swing around the lever fulcrum formed by the rotating block two, pushing the slider to slide horizontally on the upper concave surface of the connecting shell and compressing the spring two. This causes the T-shaped plate to extend from inside the connecting shell and fit against the side of the gripping plate, applying lateral pressure to the gripping plate. This helps the gripping plate achieve double locking between the jacking base and the ground, effectively preventing the jacking base from lifting or shifting during the jacking process and ensuring the stability of the jacking operation. 3. After one jacking cycle is completed, the oil pump control console controls the hydraulic jacks to retract, and through the connecting block, it drives the jacking base to move towards the culvert body, so that the jacking base automatically completes the preparation work for the next cycle, which facilitates continuous operation of the entire jacking system. Compared with the cumbersome operation of disassembling and assembling multiple long jacking columns required by traditional construction, this device integrates the jacking equipment into a movable jacking base, and directly realizes the equipment movement through the extension and retraction of the hydraulic jacks, which simplifies the construction process and saves labor and time costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the left visual axis of this application; Figure 2 This is a schematic diagram of the right axial view of this application; Figure 3 This is a bottom-view axial view of the present application; Figure 4 This is a partial structural cross-sectional view of this application; Figure 5 This is an exploded view of the guide plate and jacking base structure of this application; Figure 6 This is an exploded view of the hydraulic jack and jacking base structure of this application; Figure 7 This is a sectional view of the jacking base structure of this application; Figure 8 This is an exploded view of the jacking base and gripping floor structure of this application; Figure 9 for Figure 8 Enlarged view of point A in the middle; Figure 10 This is an exploded view of the pressurization mechanism and jacking base structure of this application; Figure 11 This is an exploded rear view of the pressurization mechanism and jacking base structure of this application; Figure 12 This is an exploded view of the transmission block 2 and slider structure of this application.

[0027] Reference numerals: 1. Jacking base; 2. Guide plate; 3. Culvert body; 4. Extrusion plate; 5. Piston; 6. Spring 1; 7. Hydraulic jack; 8. Ball joint; 9. Pressurization mechanism; 901. Transmission block one; 902. Transmission block two; 903. Rotating block one; 904. Slider; 905. Rotating block two; 906. T-shaped plate; 907. Spring two; 908. Rotating shaft one; 909. Rotating shaft two; 910. Rotating shaft three; 911. Rotating hole one; 912. Rotating hole two; 913. Rotating hole three; 10. Connecting block; 11. Spring 3; 12. Grip plate; 13. Hydraulic cylinder; 14. Wheel; 15. Fixed shaft; 16. Limiting plate; 17. Conveying pipe; 18. Three-way valve; 19. Roller; 20. Fixed shell; 21. Slide plate; 22. Oil pump control console; 23. Rectangular groove; 24. Movable groove; 25. Hydraulic chamber; 26. Limiting groove; 27. Conveying chamber; 28. Through hole; 29. ​​Conveying port; 30. Guide hole; 31. Circular hole one; 32. Slide groove one; 33. Circular groove; 34. Grip groove; 35. Wheel groove; 36. Open groove; 37. Trapezoidal block; 38. Slide groove two; 39. Connecting shell; 40. Circular hole two. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1 - Figure 12 This application will be described in further detail.

[0029] This application discloses a culvert jacking attitude correction and guidance mechanism based on multi-point stress balance.

[0030] Reference Figure 1-10This application pertains to the field of tunneling and provides a culvert jacking attitude correction and guidance mechanism based on multi-point stress balance. The mechanism includes a jacking base 1 and guide plates 2 symmetrically and movably inserted on one side of the upper end of the jacking base 1. The shape of the guide plates 2 (e.g., ...) Figure 5 As shown), a culvert body 3 is fixed at one end of the guide plate 2 away from the jacking base 1. The opposite sides of the two guide plates 2 away from the jacking base 1 are fixed to the inner walls of the culvert body 3. A rectangular groove 23 is opened at the upper end of the side of the jacking base 1 facing the culvert body 3. A movable groove 24 is symmetrically opened on the side wall of the rectangular groove 23. Multiple extrusion plates 4 are slidably arranged inside the movable groove 24. The side wall of the guide plate 2 located inside the movable groove 24 abuts against one side of the extrusion plate 4. A spring 6 is fixed at the side of the extrusion plate 4 away from the guide plate 2. The two ends of the spring 6 are fixed to the extrusion plate 4 and the side wall of the movable groove 24, respectively. A circular hole 40 is opened in the middle of the extrusion plate 4. Multiple through holes 28 are opened on the inner wall of the movable groove 24. Multiple hydraulic chambers 25 are opened on both sides of the upper end of the jacking base 1. The multiple hydraulic chambers 25 are located on the outside of the two movable grooves 24, and the hydraulic chambers 25 correspond to the multiple through holes 28 and are connected to the corresponding through holes 28.

[0031] A piston 5 is slidably disposed inside the hydraulic chamber 25. The piston 5 is composed of a rectangular plug body and a cylinder. The plug rod of the piston 5 passes through the through hole 28. The diameter of the plug rod of the piston 5 is the same as the diameter of the circular hole 40. In the initial state, the end of the plug rod of the piston 5 is flush with the side wall of the extrusion plate 4. A guide hole 30 is opened on the side wall of the hydraulic chamber 25. A conveying chamber 27 is symmetrically opened at the upper end of the jacking base 1. The flow channel cross section of the conveying chamber 27 is L-shaped (e.g., ...). Figure 7 As shown), multiple hydraulic chambers 25 are connected to the conveying chamber 27 through guide holes 30. The jacking base 1 is provided with a conveying port 29 at the conveying chamber 27. A conveying pipe 17 is fixedly connected to the jacking base 1 at the conveying port 29. Two sets of hydraulic jacks 7 are symmetrically and movably arranged at the lower end of the side of the jacking base 1 facing the culvert body 3. The hydraulic jacks 7 are double-acting jacks produced by Taizhou Nanfang Hydraulic Tools Manufacturing Co., Ltd. There is at least one hydraulic jack in each set. A three-way valve 18 is fixedly connected to the oil inlet of the two outermost hydraulic jacks 7. The ends of the two conveying pipes 17 away from the conveying port 29 are connected to the two outermost hydraulic jacks 7 respectively through the three-way valve 18. Multiple circular grooves 33 are provided at the lower end of one side of the jacking base 1. The number of circular grooves 33 is the same as the number of hydraulic jacks 7, and each circular groove 33 corresponds to one hydraulic jack 7.

[0032] A circular hole 31 is provided in the middle of one side of the circular groove 33. A connecting block 10 is slidably disposed inside the circular groove 33. The connecting block 10 has a stepped shaft structure. The diameter of one end of the connecting block 10 is the same as the diameter of the circular hole 31. One end of the connecting block 10 movably passes through the circular hole 31. One end of the connecting block 10 is fixed to the fixed end of the hydraulic jack 7. A spring 31 is fixed to the end of the connecting block 10 away from the hydraulic jack 7. The two ends of the spring 31 are respectively fixed to the end of the connecting block 10 away from the hydraulic jack 7 and the inner wall of the circular groove 33. A ball joint 8 is fixed at one end of the jacking base 1. The end of the ball joint 8 away from the hydraulic jack 7 is fixed to the lower end of one side of the culvert body 3. A gripping groove 34 is opened in the middle of the bottom end of the jacking base 1. Multiple hydraulic cylinders 13 are vertically fixed on the inner top surface of the gripping groove 34. The hydraulic cylinders 13 are HSG series engineering hydraulic cylinders produced by Shaoyang Weike Hydraulic Co., Ltd. The bottom ends of the multiple hydraulic cylinders 13 are fixed with gripping plates 12, which are used to extend downward to contact the ground during the jacking operation, increase the frictional resistance between the jacking base 1 and the foundation, and prevent the jacking reaction force from causing the jacking base 1 to lift or shift.

[0033] Multiple trapezoidal blocks 37 are formed on the inner wall of one side of the lower end of the gripping groove 34. Multiple wheel grooves 35 are formed on one side of the bottom end of the jacking base 1. An open groove 36 is formed on one side of the bottom end of the jacking base 1. The open groove 36 and the multiple wheel grooves 35 are located on both sides of the gripping groove 34. Multiple trapezoidal blocks 37 are fixed inside the open groove 36. The top and one side of the trapezoidal blocks 37 are fixed to the inner top surface and side wall of the open groove 36, respectively. Fixed shafts 15 are fixed on both sides of the inner wall of the wheel groove 35 and between two adjacent trapezoidal blocks 37. A wheel 14 is rotatably sleeved on the outer side of the fixed shaft 15. Limiting grooves are symmetrically formed in the middle of one side of the jacking base 1. 26. The limiting groove 26 is located diagonally below the conveying port 29. A limiting plate 16 is movably inserted inside the limiting groove 26. The shape and size of the limiting groove 26 are larger than the cross-sectional shape and size of the limiting plate 16. The end of the limiting plate 16 away from the jacking base 1 is fixed to the lower end of one side of the culvert body 3. A plurality of sliding grooves 32 are opened at the lower end of one side of the jacking base 1. A pressurizing mechanism 9 is set at the lower end of the jacking base 1 at the sliding groove 32. The pressurizing mechanism 9 is connected to the hydraulic jack 7. The sliding groove 32 is located between the circular hole 31 and the limiting groove 26. The sliding groove 32 is connected to the gripping groove 34 and avoids the movement trajectory of the hydraulic cylinder 13.

[0034] A fixing shell 20 is fixed at the lower end of the side of the jacking base 1 opposite to the culvert body 3. The shape of the fixing shell 20 is as follows (e.g., Figure 10As shown, the fixed shell 20 has multiple sliding grooves 38 on one side near the jacking base 1. The number of sliding grooves 38 is the same as the number of sliding grooves 32, and the corresponding sliding grooves 38 are connected to the sliding grooves 32. Multiple connecting shells 39 are fixed at the bottom of one side of the fixed shell 20. The number of connecting shells 39 is the same as the number of sliding grooves 38, and the multiple connecting shells 39 are located below the corresponding sliding grooves 38. The top of the connecting shells 39 is fixed to the bottom of the jacking base 1. A sliding plate 21 is provided below the jacking base 1 and the culvert body 3. The top of the sliding plate 21 is coated with lubricating grease to reduce the sliding friction resistance between the culvert body 3 and the sliding plate 21 during the jacking process. Multiple guide blocks are provided on both sides of the top of the sliding plate 21.

[0035] Rollers 19 are provided at the lower ends of both sides of the jacking base 1. The rollers 19 are adjustable and extendable. The wheel surface of the rollers 19 rolls in contact with the guide pier sidewalls on both sides of the slide plate 21, which is used to limit and guide the jacking base 1 laterally during the jacking process. The culvert body 3 is equipped with an oil pump control console 22. The oil pump control console 22 includes a hydraulic pump station, a solenoid valve group and a control circuit. The oil circuits of multiple hydraulic jacks 7 are grouped or independently controlled through the oil pump control console 22 to realize the coordinated extension or differential adjustment of each hydraulic jack 7.

[0036] The output end of the oil pump control console 22 is electrically connected to the solenoid directional valves of multiple hydraulic jacks 7 and hydraulic cylinders 13, respectively. Multiple pressure sensors are set at the hydraulic chamber 25 and the oil inlet of the hydraulic jacks 7, and multiple displacement sensors are set on the side wall of the guide plate 2. Each sensor is electrically connected to the input end of the oil pump control console 22 through a signal line. The oil pump control console 22 controls the opening and closing of the solenoid valve group according to the sensor feedback signal to realize the circuit control of each hydraulic jack 7 and hydraulic cylinder 13. The oil pump control console 22 is electrically connected to the solenoid directional valve of the hydraulic cylinder 13 to control the lifting and lowering sequence of the gripping floor 12.

[0037] This device is suitable for culvert jacking construction in municipal engineering or underground passage construction, and can monitor and actively correct the jacking posture of the culvert body 3 in real time. Before use, a sliding plate 21 needs to be poured at the bottom of the working pit, and lubricating grease needs to be applied to the top of the sliding plate 21. Multiple guide piers are set along both sides of the plate. The jacking base 1 is hoisted onto the sliding plate 21, and the rollers 19 on both sides are brought into contact with the side walls of the guide piers. The culvert body 3 is placed on one side of the jacking base 1, and the two guide plates 2 are inserted into the movable grooves 24 at the upper end of the jacking base 1, and the limiting plate 16 is positioned. Insert into the limiting groove 26; install multiple hydraulic jacks 7 into the circular groove 33 of the jacking base 1 through the connecting block 10, and fix the jacking end of the hydraulic jack 7 to the square culvert body 3 through the ball joint 8; connect the conveying pipe 17 between the conveying port 29 of the conveying chamber 27 and the three-way valve 18 of the outermost hydraulic jack 7; connect the pressurizing mechanism 9 to the hydraulic jack 7 and assemble it in the fixed shell 20 and the connecting shell 39; connect the hydraulic pipelines of the hydraulic cylinder 13 and the oil pump control console 22 to each hydraulic jack 7 and the hydraulic chamber 25 to complete the overall installation.

[0038] The three-way valve 18 is controlled by the oil pump control console 22 to switch the passage. The air in the hydraulic jack 7, delivery pipe 17, delivery chamber 27 and hydraulic chamber 25 is purged by the external hydraulic pump. Then, hydraulic oil is injected to complete the hydraulic system initialization, ensuring that each chamber is filled with oil to transmit pressure.

[0039] In use, firstly, the hydraulic cylinder 13 is extended by controlling the oil pump control console 22, so that the gripping plate 12 is pressed against the sliding plate 21, and the jacking base 1 is fixed; then, the hydraulic jack 7 is extended to push the culvert body 3 forward. When the culvert body 3 deflects slightly, the guide plate 2 will move laterally. Through the contact between the side wall of the guide plate 2 and the extrusion plate 4, the extrusion plate 4 compresses the spring 6 and moves in the movable groove 24. The elastic restoring force of the spring 6 is used to adaptively correct the slight shaking. The guide plate 2 collects the angular displacement signal of the culvert body 3 relative to the jacking base 1. This signal is transmitted to the extrusion plate 4 through mechanical rigidity, causing the extrusion plate 4 to overcome the preload of the spring 6 while the circular hole 40 inside it generates radial displacement. The piston 5 and the circular hole 40 cooperate to form a proportional distribution valve with normally closed characteristics. When the deflection of the culvert body 3 exceeds the preset dead zone, the high-pressure hydraulic oil in the hydraulic chamber 25 enters the delivery chamber 27 instantaneously through the guide hole 30, which breaks the pressure balance at the outer actuator end of the culvert body 3 and generates reverse correction. The hydraulic oil in the delivery chamber 27 enters the oil inlet of the corresponding outermost hydraulic jack 7 through the delivery pipe 17 and the three-way valve 18. By changing the oil pressure of the hydraulic jack 7, its jacking force changes. At this time, the internal pressure of the other hydraulic jacks 7 automatically returns to zero with the adjustment of the oil pump control panel 22. Then, the ball joint 8 applies a corrective torque to the culvert body 3, so that the jacking posture of the culvert body 3 is corrected. While the hydraulic jack 7 is jacking and correcting the deviation, it drives the pressurizing mechanism 9 to run, and assists the gripping floor 12 to achieve double locking between the jacking base 1 and the ground. After one jacking operation is completed, the hydraulic cylinder 13 is retracted by the oil pump control console 22, which releases the gripping plate 12 from the sliding plate 21. Then, the hydraulic jack 7 is retracted, which moves the jacking base 1 toward the culvert body 3 to reset, preparing for the next jacking operation. Throughout the jacking process, the limiting plate 16 always slides within the limiting groove 26. When the culvert body 3 deflects unexpectedly and significantly, the limiting plate 16 abuts against the side wall of the limiting groove 26, which acts as a redundant safety mechanism to limit the maximum deflection angle of the culvert body 3.

[0040] Reference Figure 9-12 The pressurizing mechanism 9 includes a symmetrically arranged transmission block 901 and a transmission block 902 that abuts against the transmission block 901. The transmission block 901 is integrally formed by an irregularly shaped connecting plate and multiple wedge-shaped blocks. The shape of the transmission block 901 is as follows (e.g., Figure 10 As shown), the lower ends of two transmission blocks 901 are fixed to the ends of two sets of hydraulic jacks 7 near the jacking base 1, respectively. The wedge-shaped blocks of transmission blocks 901 are slidably inserted into the corresponding slide grooves 32 and can slide laterally therein. Multiple transmission blocks 902 are provided at the end of transmission blocks 901 away from the hydraulic jacks 7. The top end of transmission blocks 902 is provided with an inclined surface. The inclined surface at the top end of transmission blocks 902 abuts against the inclined surface of the wedge-shaped blocks at the end of transmission blocks 901 away from the hydraulic jacks 7, which is used to convert the horizontal movement of transmission blocks 901 into the vertical movement of transmission blocks 902. Transmission blocks 902 slide in the corresponding slide grooves 38. Rotating blocks 903 are rotatably provided at the lower end of transmission blocks 902. Rotating holes 911 are symmetrically opened at the lower end of transmission blocks 902. The shape of rotating blocks 903 (as shown) Figure 12As shown), both ends of the rotating block 903 are provided with a circular hole, and both ends of the rotating block 903 are fixedly provided with a rotating shaft 908, which is fixedly inserted into the circular hole.

[0041] A rotating hole 912 is symmetrically provided in the middle of the rotating block 903. A slider 904 is rotatably provided at the end of the rotating block 903 away from the transmission block 902. The slider 904 slides on the concave surface of the corresponding connecting shell 39. A T-shaped plate 906 is slidably provided at the end of the slider 904 away from the rotating block 903 on the concave surface of the connecting shell 39. The shape of the T-shaped plate 906 is consistent with the shape of the trapezoidal block 37. The T-shaped plate 906 is retracted into the connecting shell 39 in the initial state. When the gripping plate 12 is extended, it is pushed against the gripping plate 1. On the side of 2, a spring 907 is provided on the side of the T-shaped plate 906 near the slider 904. The two ends of the spring 907 are fixed to the sides of the slider 904 and the T-shaped plate 906 that are close to each other. The slider 904 has symmetrically opened rotating holes 913 on the end near the rotating block 903. One rotating shaft 908 is located outside the rotating block 903 and its two ends rotate through the two rotating holes 911. The other rotating shaft 908 is located outside the rotating block 903 and its two ends rotate through the two rotating holes 913.

[0042] Rotating block 2 905 is rotatably mounted in the middle of rotating block 1 903. Rotating shaft 2 909 is rotatably mounted through both ends of rotating block 2 905. Circular holes 2 are opened at both ends of rotating block 2 905. Rotating shaft 2 909 is fixedly mounted through the circular holes 2 at both ends of rotating block 2 905 and fixedly mounted through the circular hole 2 at the end of rotating block 2 905 away from rotating block 1 903. The two ends of rotating shaft 2 909 located outside rotating block 2 905 are rotatably mounted through two rotating holes 3 913. The two ends of rotating shaft 3 910 located outside rotating block 2 905 are rotatably connected to both sides of the inner wall of sliding groove 2 38, thereby making rotating block 2 905 a lever fulcrum.

[0043] The formula for calculating the elastic force of springs 1-6, 2-907, and 3-11 is F=kx, where F represents the spring force, k represents the spring constant, and x represents the spring compression.

[0044] During the jacking process of hydraulic jack 7, hydraulic jack 7 generates a reaction force, causing connecting block 10 to slide horizontally within circular groove 33 against the elastic force of spring 11. Simultaneously, transmission block 901 extends horizontally with hydraulic jack 7, causing the wedge-shaped block at the end of transmission block 901 to slide in slide groove 32. Through the contact between the inclined surface of the wedge-shaped block and the inclined surface at the top of transmission block 902, the horizontal movement is converted into vertical downward movement of transmission block 902 within slide groove 38. 2. When moving downwards, the motion is transmitted through the rotating block 903 rotatably connected to its lower end, causing the rotating block 903 to swing around the lever fulcrum formed by the rotating block 905, and then the slider 904 slides horizontally on the upper concave surface of the connecting shell 39; when the slider 904 slides, it compresses the spring 907, pushing the T-shaped plate 906 to extend out from the inside of the connecting shell 39, so that the T-shaped plate 906 fits against the side of the gripping floor 12, thereby applying lateral pressure to the gripping floor 12, assisting the gripping floor 12 in achieving a stable lock between the jacking base 1 and the ground.

[0045] The implementation principle of the culvert jacking attitude correction and guidance mechanism based on multi-point stress balance in this application embodiment is as follows: the hydraulic cylinder 13 is controlled by the oil pump control console 22 to press the gripping plate 12 against the sliding plate 21 to fix the jacking base 1. Then, the hydraulic jack 7 is started to push the culvert body 3 to jack. When the culvert body 3 deflects, the guide plate 2 moves laterally, which drives the extrusion plate 4 to compress the spring 6 to achieve fine adjustment. When the deflection continues, the piston 5 is triggered to move, so that the hydraulic oil in the hydraulic chamber 25 flows into the delivery chamber 27, and then enters the outermost hydraulic jack 7 through the delivery pipe 17 and the three-way valve 18 to adjust the jacking force. The correction torque is applied through the ball joint 8. During jacking, the hydraulic jack 7 drives the transmission block 901 to drive the transmission block 902 to move vertically, thereby pushing the slider 904 and the T-shaped plate 906 to stick to the gripping plate 12 for auxiliary locking.

[0046] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A culvert jacking attitude correction and guidance mechanism based on multi-point stress balance, characterized in that: The jacking base (1) includes a guide plate (2) symmetrically and movably inserted on one side of the upper end of the jacking base (1). A culvert body (3) is fixedly provided at one end of the guide plate (2) away from the jacking base (1). Multiple hydraulic jacks (7) are movably provided on one side of the jacking base (1) facing the culvert body (3). A ball joint (8) fixed to the culvert body (3) is fixed at one end of the hydraulic jack (7) away from the jacking base (1). Multiple extrusion plates (4) that abut against the side wall of the guide plate (2) are symmetrically slidably arranged on one side of the upper end of the jacking base (1). A spring (6) is fixedly provided on the side of the extrusion plate (4) away from the guide plate (2). Multiple hydraulic chambers (25) are opened on both sides of the upper end of the jacking base (1). A piston (5) that moves through the middle of the corresponding extrusion plate (4) is slidably arranged inside the hydraulic chamber (25). A conveying chamber (27) that communicates with the hydraulic chamber (25) is symmetrically opened at the upper end of the jacking base (1) near the hydraulic chamber (25). A conveying pipe (17) is fixedly arranged through the conveying chamber (27) of the jacking base (1). The ends of the two conveying pipes (17) away from the conveying port (29) are fixedly connected to the two outermost hydraulic jacks (7). Multiple hydraulic cylinders (13) are fixedly arranged in the middle of the bottom end of the jacking base (1). A gripping plate (12) is fixedly arranged at the bottom end of the multiple hydraulic cylinders (13).

2. The culvert jacking attitude correction and guidance mechanism based on multi-point stress balance according to claim 1, characterized in that: The lower end of the jacking base (1) is provided with a pressure mechanism (9) connected to the hydraulic jack (7) at the slide groove (32). The pressure mechanism (9) cooperates with the gripping floor (12) to assist the gripping floor (12) in locking the jacking base (1) when the hydraulic jack (7) is jacking.

3. The culvert jacking attitude correction and guidance mechanism based on multi-point stress balance according to claim 1, characterized in that: The top-mounted base (1) has a rectangular groove (23) on the upper end of the side facing the culvert body (3). The sidewall of the rectangular groove (23) has symmetrical movable grooves (24). Multiple extrusion plates (4) slide in the movable grooves (24). One end of the guide plate (2) extends into the movable grooves (24).

4. The culvert jacking attitude correction and guidance mechanism based on multi-point stress balance according to claim 1, characterized in that: The two ends of the spring (6) are fixed to the sidewalls of the compression plate (4) and the movable groove (24), respectively.

5. The culvert jacking attitude correction and guidance mechanism based on multi-point stress balance according to claim 1, characterized in that: The lower end of one side of the jacking base (1) is provided with a plurality of circular grooves (33). A connecting block (10) is slidably arranged inside the circular groove (33). One end of the connecting block (10) is fixed to the fixed end of the hydraulic jack (7). A spring three (11) is fixed to the end of the connecting block (10) away from the hydraulic jack (7). The two ends of the spring three (11) are respectively fixed to the end of the connecting block (10) away from the hydraulic jack (7) and the inner wall of the circular groove (33).

6. The culvert jacking attitude correction and guidance mechanism based on multi-point stress balance according to claim 1, characterized in that: The lower end of one side of the jacking base (1) is provided with multiple sliding grooves (32). The lower end of the side of the jacking base (1) away from the culvert body (3) is fixedly provided with a fixed shell (20). The side of the fixed shell (20) close to the jacking base (1) is provided with multiple sliding grooves (38) that are connected to the corresponding sliding grooves (32). The bottom end of one side of the fixed shell (20) is fixedly provided with multiple connecting shells (39).

7. A culvert jacking attitude correction and guiding mechanism based on multi-point stress balance according to claim 2, characterized in that: The pressurizing mechanism (9) includes a symmetrically arranged transmission block 1 (901) and a transmission block 2 (902) that abuts against the transmission block 1 (901). One end of the transmission block 1 (901) is fixed to the fixed end of a plurality of hydraulic jacks (7). The end of the transmission block 1 (901) away from the hydraulic jacks (7) slides in a plurality of slide grooves 1 (32). The transmission block 2 (902) slides in slide groove 2 (38). A rotating block 1 (903) is rotatably arranged at the lower end of the transmission block 2 (902). A rotating block 2 (905) is rotatably arranged in the middle of the rotating block 1 (903). The rotating block 2 (905) is rotatably connected to the inner wall of slide groove 2 (38). The rotating block 1 (903) is rotatably connected to a slider (904) at the end away from the transmission block 2 (902). The slider (904) slides on the upper concave surface of the connecting shell (39). A T-shaped plate (906) is slidably arranged inside the connecting shell (39). The slider (904) is connected to the T-shaped plate (906) through a spring 2 (907). A spring 2 (907) is arranged on the side of the T-shaped plate (906) close to the slider (904). The two ends of the spring 2 (907) are respectively fixed to the sides of the slider (904) and the T-shaped plate (906) that are close to each other.

8. The culvert jacking attitude correction and guidance mechanism based on multi-point stress balance according to claim 1, characterized in that: The jacking base (1) and the culvert body (3) are provided with a sliding plate (21) below them. Adjustable and retractable rollers (19) are provided at the lower ends of both sides of the jacking base (1). The wheel surface of the rollers (19) makes rolling contact with the side wall of the sliding plate (21).

9. A culvert jacking attitude correction and guidance mechanism based on multi-point stress balance according to claim 1, characterized in that: A limiting groove (26) is provided in the middle of one side of the jacking base (1), and a limiting plate (16) is fixedly provided at the lower end of one side of the culvert body (3) and is movably inserted into the limiting groove (26). The size of the limiting groove (26) is larger than the cross-sectional size of the limiting plate (16) and is used to limit the maximum deflection angle of the culvert body (3).

10. A culvert jacking attitude correction and guidance mechanism based on multi-point stress balance according to claim 1, characterized in that: Multiple wheels (14) are rotatably mounted on both sides of the bottom end of the jacking base (1).

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